English: The Genesee Furnace was a pig iron blast furnace built in Charlotte, New York, in 1868 by the Charlotte Iron Works. It was rebuilt in 1884, and had an annual capacity of 20,000 short tons (18,000 t).

On June 4, 1902, Corrigan, McKinney & Co. purchased the Genesee Furnace. About $100,000 ($3,800,000 in 2024 dollars) was spent relining the furnace and erecting new stoves to increase the Charlotte's production to 200 short tons (180 t) per day.

Beginning in December 1903, the facility had its furnace relined, and received four new boilers, a fan engine (an engine with cylinders arranged radially) to power the injection of air, and new trestles for the dumping of coke and limestone. The improvements increased the furnace's capacity from 200 short tons (180 t) to 250 short tons (230 t) per day. The cost of these improvements was $175,000 ($6,100,000 in 2024 dollars).

The blast furnace was shut again in late November 1904 for major upgrades. A second stack was added, doubling the daily capacity of the facility, and three new stoves added to provide hot air for smelting. The cost of these improvements was $500,000 ($17,500,000 in 2024 dollars). The plant was shut down again on September 1, 1905, for a rebuild of the first stack, the installation of new ore and limestone elevators, and a general overhaul. The cost of these improvements was $66,000 ($2,300,000 in 2024 dollars).

The old 1,500 horsepower (1,100 kW) boilers were replaced with new, 2,500 horsepower (1,900 kW) tube boilers in April 1908. A new feed water heater and pumps were installed, and the furnaces relined. A new hoist, with more powerful engines designed by the Otis Elevator Co. of Chicago, was also erected. One of the stoves was converted into a three-pass "McClure" stove. The changes meant a 30 percent increase in daily capacity, to 325 short tons (295 t) per day.

This photo is from 1908 or 1909. It was published by George O. Kerr of Charlotte, New York. There is no copyright notice on the front or back, which means it is in the public domain under U.S. copyright law in force at the time. The postcard is postmarked March 12, 1909.